Citizen Holdings Company, Ltd.

Citizen Watch Company, Ltd.

Tatsuo Sumida

Tadashi Yasuoka

Kazuo Sakamoto

Moto Yamashita

Lubricating apparatuses () that support the axes of a stator guide () and a rotor () fit into an opening of a stator () are separate components and by fitting the stator guide () and lubricating apparatuses () into the cylindrically shaped opening of a constant diameter disposed in a bottom plate (), a bearing can be configured that aligns the central axis of the opening of the stator () and the rotational axis of the rotor () with high precision. Additionally, the structure of the lubricating apparatus () is simplified and configures an electronic timepiece that can use the bearing-less stator ().

Electronic timepiece

A radio-controlled timepiece in which its reception sensitivity is further enhanced. The radio-controlled timepiece includes: an antenna coremade of a magnetic material and formed as a single integrated body including a coiled portion () wound with a coiland extension portionsandwhich are located respectively on the end-portion sides; additional coresandmade of a magnetic material; magnetism-collection membersandmade of a magnetic material; a main plate(timepiece substrate) made of a non-magnetic material; a guide membermade of a non-magnetic material; and a liquid-crystal-panel supporting frame(magnetism-collection-member supporting members, pressing member) made of a non-magnetic material and having protrusionsand(pressing members) formed thereon. When the main plate, the guide member, and the liquid-crystal-panel supporting frameare assembled together, the protrusionsandpress the magnetism-collection members, respectively. Thus, the magnetism-collection membersandcome into contact respectively with the additional coresand, and, at the same time, the additional coresandcome into contact respectively with the extension portionsandof the antenna core. Accordingly an antenna-core body with a large single body is formed, which enhances the reception performance.

Growing community of inventors

Iruma, Japan

Tatsuo Sumida